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feat: allow non-numeric arguments with AutoSymbolics #945

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Merged
gdalle merged 2 commits into from
Dec 18, 2025
Merged

feat: allow non-numeric arguments with AutoSymbolics #945

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a461eca
feat: allow non-numeric arguments with `AutoSymbolics`
AayushSabharwal Dec 17, 2025
d93a08e
Replace dummy
gdalle Dec 18, 2025
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1 change: 1 addition & 0 deletions ...nterface/ext/DifferentiationInterfaceSymbolicsExt/DifferentiationInterfaceSymbolicsExt.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ dense_ad(backend::AutoSparse{<:AutoSymbolics}) = ADTypes.dense_ad(backend)

variablize(::Number, name::Symbol) = variable(name)
variablize(x::AbstractArray, name::Symbol) = variables(name, axes(x)...)
variablize(::T, name::Symbol) where {T} = variable(name; T)

function variablize(contexts::NTuple{C, DI.Context}) where {C}
return ntuple(Val(C)) do k
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20 changes: 20 additions & 0 deletions DifferentiationInterface/test/Back/Symbolics/test.jl
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Expand Up @@ -41,3 +41,23 @@ test_differentiation(
@test sparsity_pattern(jac!_prep) == Diagonal(trues(10))
@test sparsity_pattern(hess_prep) == Diagonal(trues(10))
end

@testset "Non-numeric arguments" begin
function differentiate_me!(out, x, c)
@assert c isa Any # Just to use it somewhere
return copyto!(out, x)
end
function differentiate_me(x, c)
tmp = similar(x)
differentiate_me!(tmp, x, c)
return tmp
end
x = rand(10)
xbuffer = copy(x)
c = "I am a string"
backend = AutoSymbolics()
jac_prep = prepare_jacobian(differentiate_me, backend, x, Constant(c))
jac!_prep = prepare_jacobian(differentiate_me!, xbuffer, backend, x, Constant(c))
@test jacobian(differentiate_me, jac_prep, backend, x, Constant(c)) ≈ I
@test jacobian(differentiate_me!, xbuffer, jac!_prep, backend, x, Constant(c)) ≈ I
end
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